I love GTA for all it's freedom and because it's basically the only third-person game in which you can do all the crazy stuff you could imagine being by walk, on a car or plane. Though I haven't play GTA V yet (waiting for the PC version) what I like most about open-world games (like Watch Dogs and of course GTA) is that when I'm tired I can just go on side missions or other stuff to gain experience or even only to do some free roaming doing stuff.   I have watch on youtube a lot of GTA Online